Effect of carbon coating on thermal stability of natural graphite spheres used as anode materials in lithium-ion batteries
| Autor: | Sung-Man Lee, Yang-Kook Sun, Hyun Joo Bang, Yoonsoo Park, Seh Min Oh |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology chemistry.chemical_element Mineralogy Electrolyte Lithium battery Lithium-ion battery Anode Differential scanning calorimetry chemistry Chemical engineering Surface modification Thermal stability Lithium Electrical and Electronic Engineering Physical and Theoretical Chemistry |
| Zdroj: | Journal of Power Sources. 190:553-557 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2009.01.067 |
| Popis: | To investigate the effect of non-graphitic carbon coatings on the thermal stability of spherical natural graphite at elevated temperature, differential scanning calorimetry (DSC) and X-ray diffraction (XRD) measurements are performed. Data from DSC studies show that the thermal stability of the surface modified natural graphite electrode is improved. The surface modification results in a decrease in the BET surface specific area. An improvement in coulombic efficiency and a reduction in irreversible capacity are also observed for the carbon-coated natural graphite. X-ray diffraction analysis confirms that carbon coating alleviates the release of intercalated lithium from natural graphite at an elevated temperature and acts as a protective layer against electrolyte attack. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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